Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
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Its high performance is a boat more suited to voyages on inland waters and small weight of the hull allows to deliver it on the upper trunk or the trailer car almost any "blind corner"....
FROM WRIST – TABLE
If you have watches that are not used, are very simple to make table. For this you need to cut from sheet metal strip, bent ,and not wearing her watch.
